Dust-cap



E. V. MYERS.

DUST CAP.

APPLICATION FILED DEC. 20. 1918,

1,399,310. Patented Dec. 6, 1921.

fly. 1.

INVENTOR WITNESS: Q 41/ fi e By Attorneys,

UNITED STATES Y PATENT OFFICE.

EUGENE 'V. MYERS, OF EAST ORAN GE, NEW JERSEY, ASSIGNOR TO A. SCHRADERS SON, INCORPORATED, OF. BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

I prism-oar.

Application filed December 20, 1918. Serial No. 267,701.

To aZZ whom it may concern:

Be it known that I, EUGENE V. MYERS, a citizen of the United States of America, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in- Dust-Caps, of which the following is a specification.

This invention relates to dust'c'aps and aims to provide certain improvements therein.

This invention is. particularly directed to dust caps of the quick-detachable type, that is to say, caps which are adapted toslide along the tire valve until a final position is approximately reached, after which they are secured in place.

The present invention comprises a cap having movable means which are formed of metal -or the like and which are preferably resilient and having a wedge member adapted to move such means inwardly to grasp the threads of the tire valve. According to the preferred form of resent invention, the movable means are in t e form of spring arms which are provided with screw-threads which are normally out of engagement with the threads of the valve and the wedge member has a screw-thread connection with the cap proper. The wedge member is also provided with means such as flats adapted to engage the flats of the tire valve so that when the cap proper is rotated, the wedge member is held against turning and a short rotary movement of the cap p'roperj very effectually clamps the device in place or releases the same.

, The invention also includes other features of invention which will be hereinafter more fully described.

In, the drawings is illustrated one form of the invention.

Figure 1 is an elevation of the cap.

Fig. 2 is an underside view of Fig. 1.

Fi 3 is an enlarged sectional view showing t e cap in diametrical section.

Fig. 4 is an elevation of the bottom'portion of the cap proper.

Fig. 5 is an underside view of Fig. 4.

Fig. 6 is a section on the line 6-6 in Fig. 3.

Referring to the drawings let'A indicate the cap as a whole which comprises the cap portion B and the wedge portion C. The cap portion B preferably carries with it a movable member or members shown as a series of movable arms DD, which preferably are spring arms, andpreferably formed as a continuation of the upper part of the cap portion. These arms are threaded as shown at E, and normally are expanded sufiiciently to slip over the valve casing without engaging the threads.

positively hold the wedging portion against rotation, I preferably provide it with flats HH, which are adapted to engage the flats of the tire valve casing. By this means the wedging portion isheld positively against rotation, so that mere manipulation of the cap portion by one of the hands of the user effects a positive tightening or loosening movement sufficient to powerfully engage or easily release the cap.

In applying the cap, the latter is slipped down over the valve casing until the bottom wedging member engages the rim nut or felly, whereupon the cap portion B is rotated. This has the effect of advancing the cap portion with relation to the wedging portion. When the wedgin portion has operated sufliciently to cause t e threads on the spring arm to engage the valve casing, the tendency of thecap portion is to screw downwardly alon the valve threads. As the foot portion is rigidly held by the rim nut, its threaded engagement with the cap proper tends to permit the cap to screw downwardly as fast as the pitch of the connecting thread .will permit. If the threads E and G are of the same pitch, the foot portion will permit the cap portion to screw downwardly at the same rate as is permitted by the valve threads. If the two threads are of different pitch, a locking action is obtained. If the thread G is a finer thread, the foot portion will be urged forwardly so as to obtain a better clamping action of the foot portion against the rim nut.

' I do not .wish to be limited thereto, as vari- While I have shown and described one form of the invention, it is understood that connect with a. valve or other structure.

This application is eneric to my application'No. 267,702, filed ecember 20, 1918.

What I claim is 1. A dust cap for tire valves or the like comprising a cap portion, movable members associated with said cap portion and provided with threads and a wedging member adapted to force said movable members inwardly, and a connection between said cap ortion and said wedging member for moving the cap portion longitudinally of the cap as the cap portion is rotated with relation to the wedging member. r

2. A dust cap for tire valves or the like comprising a cap portion, -movable members associated with said cap portlon and provided with threads and a wedging member adapted to force said movable members inwardly, and a connection between said cap portlon and said wedging member ,for moving the cap portion longitudinally as the cap portion is rotated With relation to the wedging member, and said wedging member having means for non-rotatively engagin the casing of the tire valve.

3. A dust cap for tire valves or the like comprising a cap portion integrally formed with screw-threaded spring arms, a wedging member adapted to force sald arms inwardly to clamp the screw-threads thereof intoengagement with the tire valve casing, and a screwthreaded connection between said wedging member and said cap portion whereby to move the ca portion downwardly when rotated relatively to the wedging portion, and said wedging portion havin means 'to engage the flats of the tire vave whereby to revent it from rotation relatively to the atter, and said screwthreaded connection comprising threads of different pitch from the threads of the spring arms.

'4. dust cap for tire valves or the like I comprising a cap portion formed with screwthreaded sprlng arms, a wedging member adapted to force said 'arms inwardly to clamp the screw-threads thereof into engagement with the tire valve casing, and a screw-threaded connection between said wedging member and .said cap portion whereby to move the cap ortion downwardly when rotated relative y to the wedg ing portion, and said wedging portion havin means to engage the flats of the tire va ve whereby to prevent it from rotation relatively to the latter, and said screwthreaded connection having finer threads than those of the spring arms.

5. A dust cap for tire valves or the like, comprising-a cap portion, movable clamping means-formed of substantially non-compressible material adapted normally to pass along the body ofa tire valve, and operating means for positively forclng said movable means into clamping contact with such nection with said cap portion, whereby the latter can rotate relatively thereto, and said movable means being forced by said wedging means into clamping contact with the tire valve upon such rotation.

7. A dust cap for tire valves or the like, comprising a cap portion, movable clamping means formed of substantially non-compressiblem'aterial and adapted normally to pass along the body of a tire valve, and a wedging means connected to the cap portion, the cap portion being movable rotatively with relation to the wedging means to effect a relative longitudinal movement of said cap portion and wedgin means, said clamping means being adapted to be forced by said wedging means through such relative longitudinal movement to clamp the cap to the valve body, and means for preventing unscrewing of the-cap as a whole. 8. A dust cap for'tire valves or the like, comprising a ca portion, a member associated with sai cap portion, and having means for positively preventing. its rotation, and means adapted to be positively forced into contracted position about a tire valve to hold the cap in place thereon, said means being operated by the relative rotary movement of said cap portion and member.

9. A device adapted to be attached to a threaded member or the like, comprising two parts, one of which is rotatable relatively to the other, and is adapted to be rotated by hand to connect the device to the threaded member, and a radially contract.

ible means formed of substantially noncompressible material for .engaging the threaded member, said means being moved to engage the threaded member by the rbla tive rotation of said parts, effected by the power of the hand applied through said rotating part, and means for positively holding the otherof said parts against rotation with respect to the threaded member.

In witness whereof, I have hereunto signed my name. i

EUGENE V. MYERS. 

